二級(jí)展開(kāi)式直齒圓柱齒輪減速器畢業(yè)設(shè)計(jì)-全文預(yù)覽
【正文】 th. Tooth surface hardness for high strength and low coretooth gear (20,20 Cr steel such as used by the quenching of carburized gears) or a more brittle material of the gear, usually at the tooth root bending fatigue strength to ensure that the main. If the two gears are hardened and the tooth surface hardness as high as, then as the case may be.closed for more than gear, heat, easy to bad lubrication and cause injury, such as tooth bonding, in order to control the temperature rise, but also for calculation of cooling capacity.2, open (semiopen) GearAccording to tooth surface is supposed to be based to ensure that antiwear and antifracture ability Dedendum two criteria are calculated, but as mentioned earlier, on the tooth surface abrasion resistance of the method of calculating capacity is not perfect yet, so offtype (semiopen) Gear At present, only the tooth root bending fatigue strength to ensure that the design criteria. In order to extend the open (semiopen) the life of gear, and will be visible by the specific needs of the module to achieve an appropriate increase.Before the reference of the gear wheels, spokes, wheels and other parts of the size, usually only for the structural design, strength calculation is not car擇文：齒輪傳動(dòng) 齒輪傳動(dòng)是利用兩齒輪的輪齒相互嚙合傳遞動(dòng)力和運(yùn)動(dòng)的機(jī)械傳動(dòng)。 gear diameter from a few millimeters to more than 20 meters. However, the need for specialized gear manufacturing equipment, the meshing noise transmission.Many types of gear.(1) According to the relative positions of the twoaxis and the direction of the tooth can be divided into the following types:1 column 3。因此將Ⅳ段設(shè)計(jì)成階梯形，左段直徑為40mm。 考慮齒輪端面和箱體內(nèi)壁，軸承端面和箱體內(nèi)壁應(yīng)有一定距離。2）確定軸各段直徑和長(zhǎng)度I段：d1=34mm 1）軸上零件的定位，固定和裝配2）輸出軸的設(shè)計(jì)計(jì)算選擇軸的材料，確定許用應(yīng)力由于設(shè)計(jì)的是單級(jí)減速器的輸入軸，屬于一般軸的設(shè)計(jì)問(wèn)題，選用45正火鋼，硬度170～217HBS，抗拉強(qiáng)度σb=600Mpa，彎曲疲勞強(qiáng)度σ1=255Mpa。 由上述軸各段長(zhǎng)度可算得軸支承跨距L=72＋32＋20＋16=140mm3)按彎矩復(fù)合進(jìn)行強(qiáng)度計(jì)算①求分度圓直徑：已知d1=②求轉(zhuǎn)矩：已知T1= 考慮齒輪端面和箱體內(nèi)壁，軸承端面和箱體內(nèi)壁應(yīng)有一定距離。大帶輪輪轂靠軸肩、平鍵和螺栓分別實(shí)現(xiàn)軸向定位和周向固定。 于是由 五 幾何尺寸計(jì)算1 計(jì)算大小齒輪的分度圓直徑dd2mm mm2 計(jì)算中心距3計(jì)算齒輪寬度b =取 高速級(jí)低速級(jí)齒數(shù) 模數(shù)壓力角齒頂高系數(shù)頂隙系數(shù) 齒距齒厚齒槽寬齒根高齒頂高分度圓直徑 齒高基圓直徑 齒頂圓直徑 齒根圓直徑 中心距七、 軸的設(shè)計(jì)計(jì)算1）輸入軸的設(shè)計(jì)計(jì)算選擇軸的材料，確定許用應(yīng)力由于設(shè)計(jì)的是單級(jí)減速器的輸入軸，屬于一般軸的設(shè)計(jì)問(wèn)題，選用45正火鋼，硬度170～217HBS，抗拉強(qiáng)度σb=600Mpa，彎曲疲勞強(qiáng)度σ1=255Mpa。 σF=(2kT1/d1mb)YFS1≤[σF1]確定有關(guān)參數(shù)和系數(shù)許用彎曲應(yīng)力[σFP]由課本P150圖1034查得：σFlim1=357Mpa d2=mZ2=106=265mm傳動(dòng)中心距 [σHP2]==570Mpa=513Mpa取[σHP]=513Mpa故得：d1≥【kT1(u+1)/φdu[σHP]2】1/3 =[(+1)/5132]1/3mm =3）確定齒輪傳動(dòng)主要參數(shù)及幾何尺寸模數(shù)：m=d1/Z1=根據(jù)課本P130表102 取標(biāo)準(zhǔn)模數(shù)：m=分度圓直徑d1=mZ1=25=m載荷系數(shù)k 由課本P144 則大齒輪齒數(shù)：Z2=i齒Z1=25=2）按齒面接觸疲勞強(qiáng)度設(shè)計(jì)小齒輪選用45鋼，齒面硬度為230HBS。mmTIII=9550PIII/=9550 ∵i總=i齒輪i帶∴i帶=i總/i齒輪= 運(yùn)動(dòng)參數(shù)及動(dòng)力參數(shù)計(jì)算計(jì)算各軸轉(zhuǎn)速（r/min）n電動(dòng)=960r/minIII/ i齒輪=960/= 計(jì)算各軸的功率（KW）PI=Pdη帶=4=PII=PIη齒輪軸承η齒輪==PIII=PIIη齒輪軸承η聯(lián)軸器= =3計(jì)算各軸扭矩（N根據(jù)容量和轉(zhuǎn)速，由指導(dǎo)書(shū)附表10查出有三種適用的電動(dòng)機(jī)型號(hào)，其技術(shù)參數(shù)及傳動(dòng)比的比較情況見(jiàn)下表： 傳動(dòng)比方案動(dòng)比方案電動(dòng)機(jī)型號(hào)額定功率（KW）電動(dòng)機(jī)轉(zhuǎn)速（r/min）傳動(dòng)裝置的傳動(dòng)比同步轉(zhuǎn)速滿(mǎn)載轉(zhuǎn)速總傳動(dòng)比1Y160M1847507202Y132M1441000960確定電動(dòng)機(jī)型號(hào)綜合考慮電動(dòng)機(jī)和傳動(dòng)裝置的尺寸、重量以及帶傳動(dòng)和減速器的傳動(dòng)比，可知方案1比較合適（在滿(mǎn)足傳動(dòng)比范圍的條件下，有利于提高齒輪轉(zhuǎn)速，便于箱體潤(rùn)滑設(shè)計(jì)）。 = =(2) 電機(jī)所需的工作功率：P d=FV/1000η=確定電動(dòng)機(jī)轉(zhuǎn)速：計(jì)算滾筒工作轉(zhuǎn)速：n筒=601000V/πD=601000380= 齒輪傳動(dòng)的傳動(dòng)效率高，適用的功率和速度范圍廣，使用壽命較長(zhǎng)，是現(xiàn)代機(jī)器中應(yīng)用最為廣泛的機(jī)構(gòu)之—。 確定傳動(dòng)方案：考慮到電機(jī)轉(zhuǎn)速高，傳動(dòng)功率大，將V帶設(shè)置在高速級(jí)。二、傳動(dòng)方案擬定及說(shuō)明 要求：輸送機(jī)連續(xù)工作，單向運(yùn)轉(zhuǎn)，載荷較平穩(wěn)，空載起動(dòng)，輸送帶速度允許誤差177。因此，除了不斷改進(jìn)材料品質(zhì)、提高工藝水平外，還在傳動(dòng)原理和傳動(dòng)結(jié)構(gòu)上深入探討和創(chuàng)新，平動(dòng)齒輪傳動(dòng)原理的出現(xiàn)就是一例。當(dāng)前減速器普遍存在著體積大、重量大，或者傳動(dòng)比大而機(jī)械效率過(guò)低的問(wèn)國(guó)外的減速器，以德國(guó)、丹麥和日本處于領(lǐng)先地位，特別在材料和制造工藝方面占據(jù)優(yōu)勢(shì)，減速器工作可靠性好，使用壽命長(zhǎng)。 本次的設(shè)計(jì)具體內(nèi)容主要包括：帶式輸送機(jī)傳動(dòng)總體設(shè)計(jì)；主要傳動(dòng)機(jī)構(gòu)設(shè)計(jì)；主要零、部件設(shè)計(jì)；完成主要零件的工藝設(shè)計(jì)；設(shè)計(jì)一套主要件
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